申请人:THE FURUKAWA ELECTRIC CO., LTD.
公开号:EP0977209A1
公开(公告)日:2000-02-02
There is disclosed an insulated wire, which comprises at least one insulating layer toned by applying and baking, directly or via another insulating layer on a conductor, a resin composition containing at least one selected from the group consisting of a polyamidimide resin and a polyimide resin, each having, in the molecular structure of the resin, a structure represented by formula (I), and/or a resin composition containing at least one selected from the group consisting of a polyamidimide resin and a polyimide resin, each having, in the molecular structure of the resin, a structure represented by formula (II), and said insulated wire has 0.2% yield stress of not more than 110 Mpa. This insulated wire, even if its insulation coating is made thinner, is excellent in resistance to scratches, and it is able to prevent the coating from breakage at the time of coil working, especially of the insertion of a coil into a stator slot, under rigorous conditions.
In the formulae, R1, R2, R3, and R4, each are a hydrogen atom, an alkyl group, a hydroxyl group, a halogen atom, or an alkoxy group.
本发明公开了一种绝缘电线,该电线包括至少一个绝缘层,该绝缘层是通过在导体上直接或通过另一个绝缘层涂敷和烘烤而调色的,该绝缘层是一种树脂组合物,该树脂组合物含有至少一种选自由聚酰胺酰亚胺树脂和聚酰亚胺树脂组成的组中的一种,每种树脂的分子结构中都具有式(I)所代表的结构,和/或一种树脂组合物,该树脂组合物含有至少一种选自由聚酰胺酰亚胺树脂和聚酰亚胺树脂组成的组中的一种,每种树脂的分子结构中都具有式(I)所代表的结构、或含有至少一种选自聚酰胺酰亚胺树脂和聚酰亚胺树脂组成的组的树脂组合物,每种树脂的分子结构均具有式 (II) 所表示的结构,且所述绝缘线具有 0.2% 的屈服应力不超过 110 兆帕。这种绝缘导线即使绝缘层变薄,也具有极佳的抗划伤能力,在线圈工作时,特别是在将线圈插入定子槽中的严格条件下,能够防止绝缘层破损。
式中,R1、R2、R3 和 R4 各为氢原子、烷基、羟基、卤素原子或烷氧基。